'Children are a kind of indicator species. If we can build a successful city for children, we will have a successful city for all people,' says Enrique Peñalosa, former mayor of Bogotá, credited with transforming his city. The Guardian talks to young people around the world about how they rate their home cities

Crashed websites, queues round the block and sold out stock that couldn't be replenished quick enough. It's safe to say luxury brand Missoni went down very well with their bargain-priced line at Target